v2.4.0.8

Share Based Compensation (Details) (USD $) | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 24 Months Ended | 0 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2013 Minimum [Member] | Sep. 30, 2013 Minimum [Member] | Sep. 30, 2013 Maximum [Member] | Sep. 30, 2013 Maximum [Member] | Sep. 30, 2013 Share Options [Member] | Sep. 30, 2013 Performance-Based Restricted Share Units [Member] | Sep. 30, 2013 Performance-Based Restricted Share Units [Member] | Dec. 31, 2012 Performance-Based Restricted Share Units [Member] | Feb. 19, 2013 CEO Non-Performance-Based Restricted Share Units [Member] | Mar. 01, 2012 CEO Non-Performance-Based Restricted Share Units [Member] | Feb. 19, 2013 Non-CEO Non-Performance-Based Restricted Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares reserved for issuance under the Plan (in shares) | 10,000,000 |  |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Portion of options that will become exercisable on the first anniversary of the grant date |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |
Additional options vesting each quarter based on the grantee’s continued employment over a four-year period after the first anniversary |  |  |  |  |  |  |  |  |  |  |  |  | 6.25% |  |  |  |  |  |
Additional vesting period after first anniversary |  |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |
Award expiration period |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |
Share-based compensation expense from adoption of ASC Topic 718 | $ 508,000 | $ 343,000 |  |  | $ 1,668,000 | $ 995,000 |  |  |  |  |  |  |  | $ 0 | $ 0 |  |  |  |
Assumptions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility, minimum | 45.30% |  |  |  | 45.30% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility, maximum | 47.60% |  |  |  | 47.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free interest rate, minimum | 0.85% |  |  |  | 0.85% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free interest rate, maximum | 1.29% |  |  |  | 1.29% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average expected lives | 6 years 1 month 6 days |  |  |  | 6 years 1 month 6 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeiture rate, minimum | 1.60% |  |  |  | 1.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeiture rate, maximum | 1.60% |  |  |  | 1.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend yield rate |  |  |  |  |  |  |  |  | 3.04% | 3.04% | 3.55% | 3.55% |  |  |  |  |  |  |
Number of Share Options, Outstanding [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, beginning of period (in shares) | 2,673,575 | 2,870,581 | 2,795,437 | 2,916,143 | 2,795,437 | 2,916,143 | 2,916,143 |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  | 49,000 | 49,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Exercised (in shares) | (98,611) | (20,907) |  |  | (269,101) | (61,061) |  |  |  |  |  |  |  |  |  |  |  |  |
Expired (in shares) | (628) | (52,251) |  |  | (628) | (103,284) |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited (in shares) | (112,474) | (7,465) |  |  | (112,846) | (11,340) |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, end of period (in shares) | 2,461,862 | 2,789,958 | 2,673,575 | 2,870,581 | 2,461,862 | 2,789,958 | 2,795,437 | 2,916,143 |  |  |  |  |  |  |  |  |  |  |
Weighted Average Exercise Price [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, beginning of period (in dollars per share) | $ 6.85 | $ 6.62 | $ 6.70 | $ 6.61 | $ 6.70 | $ 6.61 | $ 6.61 |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  |  | $ 10.61 | $ 8.77 |  |  |  |  |  |  |  |  |  |  |  |  |
Exercised (in dollars per share) | $ 7.12 | $ 4.36 |  |  | $ 6.08 | $ 4.16 |  |  |  |  |  |  |  |  |  |  |  |  |
Expired (in dollars per share) | $ 7.67 | $ 9.90 |  |  | $ 7.67 | $ 9.88 |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited (in dollars per share) | $ 8.52 | $ 7.76 |  |  | $ 8.52 | $ 7.54 |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, end of period (in dollars per share) | $ 6.76 | $ 6.58 | $ 6.85 | $ 6.62 | $ 6.76 | $ 6.58 | $ 6.70 | $ 6.61 |  |  |  |  |  |  |  |  |  |  |
Weighted average contractual term |  |  | 6 years 4 months 21 days | 7 years 1 month 17 days | 6 years | 6 years 10 months 24 days | 6 years 9 months | 7 years 6 months 18 days |  |  |  |  |  |  |  |  |  |  |
Weighted average grant date fair value (in dollars per share) | $ 2.04 | $ 2.00 |  |  | $ 2.04 | $ 2.00 |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested share-based compensation arrangements | $ 707,000 | $ 1,630,000 |  |  | $ 707,000 | $ 1,630,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Performance Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years | 2 years |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |
Units awarded |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 149,701 | 86,705 | 95,590
Fair value of awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10.02 | $ 8.56 | $ 10.02
Life of awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36 months | 22 months |
Annual vesting percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33.33% |  | 50.00%

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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- Definition The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The maximum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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